You should order a toured guide before u go, for skipping the masses of people that buy there ticket's there and because a good guide really brings the coloseum back to life. The architecture and the construction of the building is marvellous and the history of this place is more than just fascinating. Included in this ticket is access to the forum Romanum and the domus Aurelius. the tickets are good for two days , u can stay walking around there long after the guided tour is over..., we did!! :)